| 摘要 |
<p>A rotary biological contactor (20) ("RBC") comprises blocks (22) of plastic media in rings (24), five blocks per ring, mounted on a metal framework (26) on a horizontal rotary shaft (28), with the rings (24) axially spaced apart. Each block (22) is a stack of sheets (30, 32, 34) of plastic media, defining part-annular channels (36) between them, concentric with the shaft ((28). The sheets (30, 32, 34) have protruberances (52, 54) to space the sheets apart in each stack. Each stack of sheets (30, 32, 34) is placed between two support plates (37) and held together by two plastic through-members (38, 40). The framework (26) comprises axially-spaced-apart frames (90) between the rings (24), with sub-frames (92) having radial arms (94) and outer and inner connecting members (96, 98) forming a trapezium and two metal support members (102) extending through holes (80) in each stack on a common radius. The protruberances (52,54) deflect fluid being treated radially inwardly and/or outwardly from channel-to-channel (36) as the RBC is rotated.</p> |
